\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|}
  \hline
  \multicolumn{10}{|c|}{\textit{Student Courses}} \\ \hline 
  \textbf{Matrl.Nr.} & Surname & Date\_of\_    & Mentor\_ID & Mentor\_  & Mentor\_   & \textbf{Course\_Code} & Course\_Name    & ECTS\_   & Grade \\ 
                     &         & Birth         &            & Surname  & Office      &                       &                 & Credits  &       \\ 
  \hline \hline
  100 & John     & 1976-09-28 & 101 & Codd   & B707 & 5DV001 & Database Concepts     & 7.5 & A \\ 
  100 & John     & 1976-09-28 & 101 & Codd   & B707 & 5DV002 & Operating Systems     & 7.5 & B \\
  200 & Schmidt  & 1986-05-19 & 201 & Turing & A612 & 5DV001 & Database Concepts     & 7.5 & B \\
  200 & Schmidt  & 1986-05-19 & 201 & Turing & A612 & 5DV002 & Operating Systems     & 7.5 & B \\
  200 & Schmidt  & 1986-05-19 & 201 & Turing & A612 & 5DV003 & Computer  Networks    & 7.5 & C \\
  300 & Eriksson & 1984-02-29 & 101 & Codd   & B707 & 5DV004 & Distributed Systems   & 7.5 & A \\ \hline
\end{tabular}